Ultra-high speed permanent magnet axial gap alternator with multiple stators

Patent · Tue Jan 01 00:00:00 EST 1991

OSTI ID:867725

Hawsey, Robert A ^[1]; Bailey, J Milton ^[2]

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1. Oak Ridge, TN
2. Knoxville, TN

An ultra-high speed, axial gap alternator that can provide an output to a plurality of loads, the alternator providing magnetic isolation such that operating conditions in one load will not affect operating conditions of another load. This improved alternator uses a rotor member disposed between a pair of stator members, with magnets disposed in each of the rotor member surfaces facing the stator members. The magnets in one surface of the rotor member, which alternate in polarity, are isolated from the magnets in the other surface of the rotor member by a disk of magnetic material disposed between the two sets of magents. In the preferred embodiment, this disk of magnetic material is laminated between two layers of non-magnetic material that support the magnets, and the magnetic material has a peripheral rim that extends to both surfaces of the rotor member to enhance the structural integrity. The stator members are substantially conventional in construction in that equally-spaced and radially-oriented slots are provided, and winding members are laid in these slots. A unit with multiple rotor members and stator members is also described.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4996457
• OSTI ID: 867725
• Country of Publication: United States
• Language: English

Related Subjects

ultra-high
speed
permanent
magnet
axial
gap
alternator
multiple
stators
provide
output
plurality
loads
providing
magnetic
isolation
operating
conditions
load
affect
improved
rotor
disposed
pair
stator
magnets
surfaces
facing
surface
alternate
polarity
isolated
disk
material
sets
magents
preferred
embodiment
laminated
layers
non-magnetic
support
peripheral
rim
extends
enhance
structural
integrity
substantially
conventional
construction
equally-spaced
radially-oriented
slots
provided
winding
laid
unit
described
operating conditions
permanent magnet
preferred embodiment
material disposed
magnetic material
structural integrity
operating condition
non-magnetic material
axial gap
providing magnetic
ultra-high speed
gap alternator
multiple stator
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